In this Fortnite season 7 week 10 challenge you must shoot at least 5 targets in the shooting gallery east of wailing woods.
The shooting gallery is located East, outside wailing woods. It is near a alone standing tree. See this map:
When you are there, the shooting gallery looks like this:
Hit 5 targets to complete this challenge.
This video guide will tell you the exact location of the shooting gallery and shows you how to complete the challenge.